Wilton Ngo

A public-works 511 platform, taken from concept to production.

Drove the engineering of GEOTAB's public-works 511 platform from concept to production — building the public site and admin panel while partnering with two product owners and two designers. The platform opened GEOTAB's municipal market, reaching 30+ customers including one rendering over 100,000 road segments.

• Architected the map to render 100,000+ road segments via Mapbox vector tiling and clustering, keeping interaction smooth at city scale.
• Built two distinct surfaces — a public-facing 511 site and an internal admin panel — on a shared Mithril.js + RxJS reactive architecture.
• Coordinated delivery across two product owners, two designers, and a four-engineer team as the engineering lead.

Cut a scheduled ingestion job’s API load by over 99%.

Re-architected a scheduled GeoJSON ingestion job that was issuing one API call per road segment — over 10,000 calls every 15 minutes for large municipalities — after new rate limits began throttling the job and degrading reliability.

• Identified that per-segment calls were the wrong granularity: the API could return every segment in a service group in a single request.
• Handled the resulting larger per-call payloads with pagination, preserving complete segment data without re-introducing call volume.
• Cut calls from 10,000+ to <10 per run (>99% reduction), eliminating rate-limit throttling for the largest municipalities.

Full WCAG 2.2 AA compliance, delivered in a single quarter.

Owned a platform-wide accessibility initiative end to end, taking the product to full WCAG 2.2 AA conformance in a single quarter through systematic auditing, remediation, and a set of reusable patterns the team still builds against.

• Audited the platform with axe, Lighthouse, and manual screen-reader testing to find and prioritize conformance gaps.
• Established reusable accessible component patterns so new work stays compliant by default, not by retrofit.
• Reached full WCAG 2.2 AA conformance across the product within one quarter.

Extended the rules engine to a new class of vehicle telemetry.

Extended GEOTAB's rules engine to support street-sweeper Material Management telemetry — a vehicle class the platform was never designed for — and shipped the Tymco pilot to production for opt-in customers.

• Wrote the rules-engine extension to model new telemetry actions like total material collected and water used per trip.
• Proved the approach on a concrete hardware target (Tymco model) before generalizing.
• Shipped to production as an opt-in pilot, establishing the pattern for onboarding future vehicle classes.

A Rogers self-serve application serving 1.5M+ weekly users.

Delivered Rogers' Today's Shopping Choice IVR self-serve application, serving over 1.5 million active weekly users, and led the team's move to a modern Git version-control and review workflow.

• Shipped the FAQ, gift-card flow, and size/style selection features.
• Led team-wide adoption of Git, moving the team to a modern version-control and review workflow.
• Supported a production audience of 1.5M+ active weekly users.